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| Year | Trade Value | Weight (kg) | Quantity |
| 2005 | $716,000 | 15,074 | 32,535 |
| 2006 | $394,000 | 8,295 | 17,904 |
| 2007 | $711,000 | 14,460 | 24,370 |
| 2008 | $765,000 | 10,418 | 15,181 |
| 2009 | $220,000 | 2,502 | 3,548 |
| 2010 | $70,000 | 780 | 879 |
| 2011 | $84,000 | 1,057 | 1,342 |
Note: Quantity represents Number of pairs
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